CA FLAP SR36(13) State Route 36

Added: Mar 09, 2017 3:20 pm Modified: Mar 10, 2017 12:17 pmTrack Changes This is not an Invitation for Bid, plans and specs are not available. Advertisement is tentatively planned for March 2017 and will be advertised on a Full and Open Competition basis.

PROJECT DETAILS: CA FLAP SR36(13) State Road 36 Humboldt County

This project is for improvements to California State Route 36 (SR 36) in Humboldt County from milepost HUM 36.05 to HUM 40.44, which generally is between the communities of Bridgeville, CA and Dinsmore, CA.

The proposed improvements to SR 36 are:

• To realign the route horizontally and vertically;

• To construct two 12 feet travel lanes with 4 feet paved shoulders;

• To install underdrains, sheet drains, and horizontal drains;

• To install culverts with diameters ranging from 18 inches to 120 inches;

• To construct reinforced soil slopes, rock embankments, rock buttresses, soil anchors, and slope meshing.

Major work items include approximately:

• 66 acres of clearing and grubbing

• 427,000 cubic yards of roadway excavation

• 91,000 square yards of uniaxial geogrid

• 675,000 square yards of woven geotextile

• 23,000 cubic yards of special rock embankment

• 14,000 cubic yards of rock buttress

• 28,000 square feet of mechanically stabilized earth wall, welded wire face

• 24,000 linear feet of soil nail

• 28,000 tons of superpave asphalt concrete pavement

• 6,000 tons of hot asphalt concrete pavement

• 54,000 tons of aggregate base

• 3,000 linear feet of 24 inch diameter culvert

• 190 linear feet of 120 inch diameter culvert

• 14,000 linear feet of horizontal drain pipe

Additional Information:

The project site has a narrow bench and sharp curves making for a very limited construction site. The adjacent terrain is generally steep with tall slopes. The underlying geology is highly variable with a significant portion of the route lying on active or ancient landslides. There are also mapped fault zones within the project limits. There are numerous seeps and springs above and below the road, and streams crossing the road. This project is located in a sensitive natural setting. Provisions will be necessary to protect Federal or State listed endangered, threatened, or special concern species. Provisions will include limitations on when and where work can occur. Contractor-furnished biological monitors will be required for some elements of the work.

The solicitation for this project will occur sometime towards the end of March 2017. Bids will be evaluated on both A (direct cost) + B (time of delay cost) components.

Estimated total cost for the project is $35 to $40 million.